Highly sensitive SERS monitoring of catalytic reaction by bifunctional Ag-Pd triangular nanoplates

Publication date: Available online 10 February 2019Source: Journal of Saudi Chemical SocietyAuthor(s): Jie Yang, Xin-Yue Wang, Ling Zhou, Fan Lu, Ning Cai, Ju-Mei LiAbstractSurface-enhanced Raman spectroscopy (SERS) can attain the “fingerprint” information of molecules from their vibrational transitions for detecting chemical species and thus displays extraordinary application value in studying chemical reaction mechanism catalyzed by noble metal nanoparticles in recent years. Herein, we successfully fabricated bifunctional Ag-Pd triangular nanoplates with integration of catalytic and SERS activities, using Ag triangular nanoplates as templates and Na2PdCl4 as Pd precursor in the presence of ascorbic acid acting as reducing agent and polyvinylpyrrolidone serving as stabilizing agent. We found slowly titrating Na2PdCl4 solution, compared with the one-shot injection during reaction, can stronger restrain the galvanic replacement reaction and maintain the Ag content, therefore retaining the plasmonic and SERS properties of Ag-Pd triangular nanoplates. By easily adjusting the amount of Na2PdCl4, we can optimize the SERS and catalytic activities of Ag-Pd triangular nanoplates. The optimal Ag-Pd triangular nanoplates with dual functionalities are used to follow the catalytic reduction process of 4-nitrothiophenol in the presence of NaBH4 by SERS. The results reveal 4-nitrothiophenol is directly transformed to 4-aminothiophenol through one-step route. Thereby, the prepar...
Source: Journal of Saudi Chemical Society - Category: Chemistry Source Type: research

Related Links:

Publication date: Available online 17 March 2019Source: Gynecologic Oncology ReportsAuthor(s): Roberta Villa, Jacopo Azzollini, Bernard Peissel, Siranoush ManoukianAbstractBackgroundMayer-Rokitansky-Kuster-Hauser syndrome (MRKHS) is a congenital disorder of yet unknown etiology, characterized by agenesis/hypoplasia of the müllerian duct system. The occurrence of ovarian cancer (OC) in MRKHS is rare, with
Source: Gynecologic Oncology Reports - Category: OBGYN Source Type: research
Publication date: Available online 16 March 2019Source: International Journal of Nursing SciencesAuthor(s): Ri-hua Xie
Source: International Journal of Nursing Sciences - Category: Nursing Source Type: research
What are the safest and least invasive ways to diagnose and evaluate lung nodules? This review provides an overview of the available techniques.Seminars in Respiratory and Critical Care Medicine
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Critical Care Journal Article Source Type: news
Chemotherapy overdose may be avoided in obese patients with breast cancer using a tailored dosing strategy.Annals of Oncology
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Hematology-Oncology Journal Article Source Type: news
A new study aims to elucidate the link between PCSK9 inhibitors and glucose metabolism. Might they increase the risk of diabetes, as statins have been shown to do?European Heart Journal
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Cardiology Journal Article Source Type: news
Is brodalumab effective in treating moderate-to-severe psoriasis in patients who do not achieve adequate response with ustekinumab?The British Journal of Dermatology
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Dermatology Journal Article Source Type: news
A new study examines the tissue-specific contribution to insulin sensitivity in hepatitis C. Does insulin sensitivity improve with viral eradication?Clinical Endocrinology
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Diabetes & Endocrinology Journal Article Source Type: news
A better understanding of the evolution of brown adipose tissue may have important implications for the battle against modern obesity.Journal of the Endocrine Society
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Diabetes & Endocrinology Journal Article Source Type: news
What are the keys to effectively treating pregnant women with acute migraine while considering the safety of medications in this population?Headache
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Neurology & Neurosurgery Journal Article Source Type: news
Despite the availability of highly effective direct-acting antiviral therapeutic regimens, many barriers to HCV eradication persist.Liver International
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Gastroenterology Journal Article Source Type: news
More News: Chemistry | Middle East Health | Nanotechnology | Saudi Arabia Health | Vitamin C